#!/usr/bin/python
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

DOCUMENTATION = '''
---
module: vpc_lookup
short_description: returns a list of subnet Ids using tags as criteria
description:
     - Returns a list of subnet Ids for a given set of tags that identify one or more VPCs
version_added: "1.5"
options:
  region:
    description:
      - The AWS region to use.  Must be specified if ec2_url
        is not used.  If not specified then the value of the
        EC2_REGION environment variable, if any, is used.
    required: false
    default: null
    aliases: [ 'aws_region', 'ec2_region' ]
  aws_secret_key:
    description:
      - AWS secret key. If not set then the value of
        the AWS_SECRET_KEY environment variable is used.
    required: false
    default: null
    aliases: [ 'ec2_secret_key', 'secret_key' ]
  aws_access_key:
    description:
      - AWS access key. If not set then the value of the
        AWS_ACCESS_KEY environment variable is used.
    required: false
    default: null
    aliases: [ 'ec2_access_key', 'access_key' ]
  tags:
    desription:
      - tags to lookup
    required: false
    default: null
    type: dict
    aliases: []

requirements: [ "boto" ]
author: John Jarvis
'''

EXAMPLES = '''
# Note: None of these examples set aws_access_key, aws_secret_key, or region.
# It is assumed that their matching environment variables are set.

# Return all instances that match the tag "Name: foo"
- local_action:
    module: vpc_lookup
    tags:
        Name: foo
'''

import sys

AWS_REGIONS = ['ap-northeast-1',
               'ap-southeast-1',
               'ap-southeast-2',
               'eu-west-1',
               'sa-east-1',
               'us-east-1',
               'us-west-1',
               'us-west-2']

try:
    from boto.vpc import VPCConnection
    from boto.vpc import connect_to_region
except ImportError:
    print "failed=True msg='boto required for this module'"
    sys.exit(1)


def main():

    module=AnsibleModule(
        argument_spec=dict(
            region=dict(choices=AWS_REGIONS),
            aws_secret_key=dict(aliases=['ec2_secret_key', 'secret_key'],
                                no_log=True),
            aws_access_key=dict(aliases=['ec2_access_key', 'access_key']),
            tags=dict(default=None, type='dict'),
        )
    )

    tags = module.params.get('tags')
    aws_secret_key = module.params.get('aws_secret_key')
    aws_access_key = module.params.get('aws_access_key')
    region = module.params.get('region')

    # If we have a region specified, connect to its endpoint.
    if region:
        try:
            vpc = connect_to_region(region, aws_access_key_id=aws_access_key,
                                    aws_secret_access_key=aws_secret_key)
        except boto.exception.NoAuthHandlerFound, e:
            module.fail_json(msg=str(e))
    else:
        module.fail_json(msg="region must be specified")
    vpc_conn = VPCConnection()
    subnet_ids = []
    for subnet in vpc_conn.get_all_subnets(filters={'tag:' + tag: value
                                      for tag, value in tags.iteritems()}):
        subnet_ids.append(subnet.id)
    vpc_ids = []
    for vpc in vpc.get_all_vpcs(filters={'tag:' + tag: value
                                      for tag, value in tags.iteritems()}):
        vpc_ids.append(vpc.id)

    module.exit_json(changed=False, subnet_ids=subnet_ids, vpc_ids=vpc_ids)


# this is magic, see lib/ansible/module_common.py
#<<INCLUDE_ANSIBLE_MODULE_COMMON>>

main()
